公开(公告)号：US08660150B2

公开(公告)日：2014-02-25

申请号：US13297723

申请日：2011-11-16

申请人： Alon Geva ,  Ehud Malik ,  Yaakov Stein

发明人： Alon Geva ,  Ehud Malik ,  Yaakov Stein

IPC分类号： H04J3/06

CPC分类号： H04L12/2879 ,  H04J3/0667 ,  H04J3/0673

摘要： A method and system in which a Digital Subscriber Line Access Multiplexer (DSLAM) that is part of a DSL (Digital Subscriber Line) system is able to provide synchronous services to end user equipment connected to the DSLAM via a DSL link and Customer Premises Equipment (CPE). A sniffer device having direct or indirect access to a Primary Reference Clock (PRC) of the DSL system calculates the phase difference between the PRC and the DSLAM's Local Timing Reference (LTR). The phase difference is sent to the CPEs requiring accurate reference clock frequency. The CPEs are able to derive the PRC from the phase difference information transmitted by the sniffer device thus enabling synchronous end user equipment operation.

摘要翻译： 作为DSL（数字用户线路）系统的一部分的数字用户线路接入复用器（DSLAM）能够通过DSL链路和客户端设备（例如，向DSLAM提供连接到DSLAM的终端用户设备）提供同步服务的方法和系统 CPE）。 具有对DSL系统的主参考时钟（PRC）的直接或间接访问的嗅探装置计算PRC和DSLAM的本地定时参考（LTR）之间的相位差。 相位差发送到需要精确参考时钟频率的CPE。 CPE能够根据由嗅探装置发送的相位差信息导出PRC，从而实现同步最终用户设备的操作。

公开(公告)号：US08068430B2

公开(公告)日：2011-11-29

申请号：US12263893

申请日：2008-11-03

申请人： Alon Geva ,  Ehud Malik ,  Yaakov Stein

发明人： Alon Geva ,  Ehud Malik ,  Yaakov Stein

IPC分类号： G01G31/08 ,  H04J3/16

CPC分类号： H04L12/2879 ,  H04J3/0667 ,  H04J3/0673

摘要： A method and system in which a Digital Subscriber Line Access Multiplexer (DSLAM) that is part of a DSL (Digital Subscriber Line) system is able to provide synchronous services to end user equipment connected to the DSLAM via a DSL link and Customer Premises Equipment (CPE). A sniffer device having direct or indirect access to a Primary Reference Clock (PRC) of the DSL system calculates the phase difference between the PRC and the DSLAM's Local Timing Reference (LTR). The phase difference is sent to the CPEs requiring accurate reference clock frequency. The CPEs are able to derive the PRC from the phase difference information transmitted by the sniffer device thus enabling synchronous end user equipment operation.

摘要翻译： 作为DSL（数字用户线路）系统的一部分的数字用户线路接入复用器（DSLAM）能够通过DSL链路和客户端设备（例如，向DSLAM提供连接到DSLAM的终端用户设备）提供同步服务的方法和系统 CPE）。 具有对DSL系统的主参考时钟（PRC）的直接或间接访问的嗅探装置计算PRC和DSLAM的本地定时参考（LTR）之间的相位差。 相位差发送到需要精确参考时钟频率的CPE。 CPE能够根据由嗅探装置发送的相位差信息导出PRC，从而实现同步最终用户设备的操作。

公开(公告)号：US08971356B2

公开(公告)日：2015-03-03

申请号：US13097112

申请日：2011-04-29

申请人： Alon Geva ,  Gabriel Zigelboim ,  Yaakov Stein

发明人： Alon Geva ,  Gabriel Zigelboim ,  Yaakov Stein

IPC分类号： H04J3/06 ,  H04L12/26 ,  H04L12/24

CPC分类号： H04J3/0667 ,  H04J3/067 ,  H04J3/0682 ,  H04L41/06 ,  H04L43/106

摘要： Apparatus for monitoring a packet switched network, the apparatus comprising: at least one port for receiving and transmitting packets; a local clock; and a packet inspector that uses time from the local clock to timestamp packets received at a port of the at least one port, and additionally copies timing information from received timing distribution packets, which are transmitted from a master clock to a slave clock in order to discipline the slave clock, and forwards the received packets for transmission from a port of the at least one port; wherein the apparatus uses the timestamp of a received timing distribution packet and the copied timing information to monitor timing distribution performance of the network.

摘要翻译： 用于监视分组交换网络的装置，所述装置包括：用于接收和发送分组的至少一个端口; 当地时钟 以及数据包检查器，其使用来自本地时钟的时间来对在所述至少一个端口的端口处接收的分组进行时间戳记，并且还从从主时钟发送到从时钟的接收定时分布分组复制定时信息，以便 纪律从时钟，并且从所述至少一个端口的端口转发所接收的用于传输的分组; 其中所述装置使用所接收的定时分布分组的时间戳和所述复制的定时信息来监视所述网络的定时分布性能。

公开(公告)号：US20120275317A1

公开(公告)日：2012-11-01

申请号：US13097112

申请日：2011-04-29

申请人： Alon Geva ,  Gabriel Zigelboim ,  Yaakov Stein

发明人： Alon Geva ,  Gabriel Zigelboim ,  Yaakov Stein

IPC分类号： H04L12/26

CPC分类号： H04J3/0667 ,  H04J3/067 ,  H04J3/0682 ,  H04L41/06 ,  H04L43/106

摘要： Apparatus for monitoring a packet switched network, the apparatus comprising: at least one port for receiving and transmitting packets; a local clock; and a packet inspector that uses time from the local clock to timestamp packets received at a port of the at least one port, and additionally copies timing information from received timing distribution packets, which are transmitted from a master clock to a slave clock in order to discipline the slave clock, and forwards the received packets for transmission from a port of the at least one port; wherein the apparatus uses the timestamp of a received timing distribution packet and the copied timing information to monitor timing distribution performance of the network .

摘要翻译： 用于监视分组交换网络的装置，所述装置包括：用于接收和发送分组的至少一个端口; 当地时钟 以及数据包检查器，其使用来自本地时钟的时间来对在所述至少一个端口的端口处接收到的分组进行时间戳记，并且另外从接收到的定时分布分组复制定时信息，定时信息从主时钟发送到从时钟，以便 纪律从时钟，并且从所述至少一个端口的端口转发所接收的用于传输的分组; 其中所述装置使用所接收的定时分布分组的时间戳和所述复制的定时信息来监视所述网络的定时分布性能。

公开(公告)号：US20110115534A1

公开(公告)日：2011-05-19

申请号：US12946872

申请日：2010-11-16

申请人： Yaakov Stein ,  Alon Geva ,  Yzhak Sorani

发明人： Yaakov Stein ,  Alon Geva ,  Yzhak Sorani

IPC分类号： H03L7/06 ,  H01J40/14

CPC分类号： G04F5/00

摘要： A frequency reference, comprising: an optical waveguide closed on itself so that a light pulse inserted into the waveguide circulates therein; a light source coupled to the waveguide and controllable to generate a light pulse that circulates in the waveguide; and a detector coupled to a region of the waveguide that generates an output pulse each time the circulating light pulse passes the region.

摘要翻译： 一种频率参考，包括：光波导自身闭合，使得插入波导中的光脉冲在其中循环; 光源，其耦合到所述波导并且可控制以产生在所述波导中循环的光脉冲; 以及耦合到波导区域的检测器，每当循环光脉冲通过该区域时产生输出脉冲。